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2,513
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Media Type
2,510
texts
2
audio
1
movies
Topics & Subjects
2,133
SPECTRUM ANALYSIS
1,768
NASA Technical Reports Server (NTRS)
275
Spectrum analysis
200
DTIC Archive
176
LINE SPECTRA
144
EMISSION SPECTRA
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Collection
1,768
NASA Network Resource and Training Site
219
American Libraries
200
Defense Technical Information Archive
192
NASA Technical Documents
85
Canadian Libraries
69
University of Toronto - Gerstein Science Information Centre
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Creator
1,768
nasa technical reports server (ntrs)
200
defense technical information center
81
american astronomical society
19
non
8
barus, carl, 1856-1935
7
kayser, heinrich gustav johannes, 1853- [from old catalog]
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Language
2,477
English
29
German
4
French
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